Gopalan A, Philips M Francklin, Jeong Jae-Hong, Lee Kwang-Pill
J Nanosci Nanotechnol. 2014 Mar;14(3):2451-8. doi: 10.1166/jnn.2014.8507.
This is the first report on the synthesis of a new functional nanocomposite gel containing amidoxime functionalized multiwall carbon nanotube (AO-MWNT-FNC GEL). The surface morphology of AO-MWNT-FNC GEL was investigated by field emission scanning electron microscopy. The modification of gel with amidoxine groups was confirmed by Fourier transform infra red spectroscopy. The AO-MWNT-FNC GEL provides effective binding with uranium ions as was ascertained by X-ray photoelectron spectroscopy. The AO-MWNT-FNC GEL was utilized as the new adsorbent for the recovery of uranium ions from aqueous solution. UV-visible spectroscopy was used to monitor the adsorption capacity of the AO-MWNT-FNC GEL toward uranium ions. The influence of initial uranium ion concentration and solution pH on the adsorption capacity of the AO-MWNT-FNC GEL were studied in batch experiments. The new FNC-GEL designed in this study is distinguished by higher adsorption capacity for uranium ions due to the synergistic contributions from high surface area of MWNT and the functional AO groups in FNC-GEL and exhibits potential for efficient recovery of uranium ions.
这是关于一种新型功能纳米复合凝胶（偕胺肟功能化多壁碳纳米管复合凝胶，AO-MWNT-FNC GEL）合成的首篇报道。通过场发射扫描电子显微镜对AO-MWNT-FNC GEL的表面形态进行了研究。利用傅里叶变换红外光谱确认了凝胶被偕胺肟基团修饰。通过X射线光电子能谱确定AO-MWNT-FNC GEL能与铀离子有效结合。AO-MWNT-FNC GEL被用作从水溶液中回收铀离子的新型吸附剂。采用紫外可见光谱监测AO-MWNT-FNC GEL对铀离子的吸附容量。在分批实验中研究了初始铀离子浓度和溶液pH值对AO-MWNT-FNC GEL吸附容量的影响。本研究设计的新型FNC-GEL因MWNT的高比表面积和FNC-GEL中功能性AO基团的协同作用，对铀离子具有更高的吸附容量，展现出高效回收铀离子的潜力。
